#231B7A#231B7A

#231B7A is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.9% C 0.152 H 276.5°. Best body text is #FFFFFF at 13.91:1 contrast (WCAG AA passes).

Color values

HEX	#231B7A
RGB	rgb(35, 27, 122)
HSL	hsl(245, 64%, 29%)
HSV	hsv(245, 78%, 48%)
CMYK	cmyk(71.3%, 77.9%, 0%, 52.2%)
CIE-LAB	lab(18.12, 35.08, -52.25)
CIE-LCH	lch(18.12, 62.93, 303.88°)
OKLab	oklab(30.94% 0.0172 -0.151)
OKLCH	oklch(30.94% 0.152 276.5)
XYZ	xyz(4.5968, 2.5459, 18.6577)
Luminance	0.0255 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B7A #727A1B

analogous

#1B437A #231B7A #531B7A

triadic

#231B7A #7A231B #1B7A23

tetradic

#231B7A #7A1B43 #727A1B #1B7A53

square

#231B7A #7A1B43 #727A1B #1B7A53

split-complementary

#231B7A #7A531B #437A1B

monochromatic

#070619 #151048 #231B7A #3126AC #483CD4

Accessibility & contrast

On white

13.91

#231B7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#231B7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B7A

13.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B7A	#FFFFFF	#000000	##FFFFFF
##231B7A	1.00	13.91	1.51	13.91
#FFFFFF	13.91	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307D

Deuteranopia (green-blind)

#002878

Tritanopia (blue-blind)

#003749

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #231b7a;
/* rgb */ color: rgb(35, 27, 122);
/* oklch */ color: oklch(30.9% 0.152 276.5);

Tailwind

colors: {
  custom: {
    50: '#6c59a1',
    500: '#231b7a',
    950: '#000000',
  },
}

SCSS

$custom: #231b7a;
$custom-light: #6c59a1;
$custom-dark: #000000;

JSON

{
  "hex": "#231b7a",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 122
  },
  "hsl": {
    "h": 245.053,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.3094,
    "c": 0.15199,
    "h": 276.5
  },
  "luminance": 0.02546
}

Semantic roles & 50–950 ramp

primary

#231B7A

secondary

#A5AE43

accent

#E741D9

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #231B7A

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →